TERMS

Question 1

a construction material produced by combining Portland
cement with aggregate and water

Answer 1

Concrete

Question 2

usually weighs from 140 to 160 lb/cu. ft.

Answer 2

Normal-weight concrete

Question 3

may weigh from 15 to 90 lb/cu. ft. and have a 28-day
compressive strength of 100 to 1000 psi

Answer 3

Lightweight insulating concrete

Question 4

concrete used for structures such as dams in which the
weight of the concrete provides most of the strength of
the structure

Answer 4

Mass concrete

Question 5

made with heavy aggregates such as barite, magnetite,
and steel punchings; used primarily for nuclear radiation
shielding

Answer 5

Heavyweight concrete

Question 6

is concrete that has been cast into the desired shape
prior to placement in a structure

Answer 6

Refractory concrete

Question 7

refers to bringing of a concrete surface to true grade with
enough mortar to produce the desired finish

Answer 7

Leveling

Question 8

refers to rounding off the formed edge of a slab to prevent
chipping or damage

Answer 8

Edging

Question 9

refers to moving a straight edge back and forth with a
sawlike motion on the surface of newly-placed concrete

Answer 9

Screeding

Question 10

premolded inserts are placed in concrete slabs to
control cracking in the concrete as a result of shrinkage

Answer 10

Jointing

Question 11

the tendency of dry materials in concrete to settle to the
bottom and displace the mixing water to the surface

Answer 11

Bleeding

Question 12

done on slabs that are left exposed or to receive thin
finishes such as resilient flooring, carpet, tile or paint

Answer 12

Troweling

Question 13

the breaking away of hardened concrete surface of a slab
to a depth of about 1/6 to 3/16 of an inch. Usually occurs
in the early age of the slab

Answer 13

Scaling

Question 14

a protected water area to provide safe and suitable
accommodation for ships for the transfer of cargo,
refueling, repairs, etc.

Answer 14

Harbor

Question 15

harbors protected from storms and waves by the natural
configuration of the land

Answer 15

Natural harbors

Question 16

harbors protected by breakwaters or harbors created by
dredging

Answer 16

Artificial harbors

Question 17

a sheltered place where the ship may receive or
discharge cargo. It includes the harbor with its approach
channels and anchorage places.

Answer 17

Port

Question 18

a navigable channel in harbor, offshore, etc., the usual
course taken by vessels in such places

Answer 18

Fairway

Question 19

a continuous structure built parallel to along the margin
of the sea or alongside riverbanks, canals, or waterways
where vessels may lie alongside to receive or discharge
cargo, embark or disembark passengers or lie at rest

Answer 19

Wharf

Question 20

any structure built into the sea but not parallel to the
coastline and includes any stage, stair landing place,
landing stage jetty, floating barge, and pontoon, any
bridge or other works connected there with

Answer 20

Pier

Question 21

a landing stage or small pier at which boats can dock or
be moored

Answer 21

Jetty

Question 22

a berth structure for mooring the ship on the open sea,
an isolated piled or gravity structure used either to
maneuver a ship or facilitate holding it in position at its
berth

Answer 22

Dolphin

Question 23

the hypothetical wave whose height and period are the
mean height and period of a wave group

Answer 23

Significant wave

Question 24

it is the highest wave in the wave group

Answer 24

Highest wave

Question 25

a wave whose height and period are equal to the mean
height and period of all the waves in the wave group

Answer 25

Mean wave

Question 26

is the wave at a place where water depth is at least onehalf of the wavelength; the wave parameters are
expressed with those of the significant wave at this place

Answer 26

Deepwater waves

Question 27

average of sea water level for all stages of the tide over a
19-year period

Answer 27

mean sea level

Question 28

is the height of the low water over a 19-year period

Answer 28

mean low water

Question 29

is the average height of the lower low waters over a 19-
year period

Answer 29

mean lower low water

Question 30

the abnormal rise of the sea level that occurs when a
typhoon passes by. This rise above normal level on this
open coast is due to atmosphere pressure reduction as
well as due to wind stress

Answer 30

storm surge

Question 31

waves with an extremely long period that mainly occur
when there is a sudden large-scale sea floor movement
usually associated with severe, shallow focus
earthquakes

Answer 31

tsunamis

Question 32

phenomenon involving abnormal oscillations of the
water level with a period of approximately a few minutes
to a few tens of minutes

Answer 32

seiche